Mini maxis shrinking

[oldschoolmarcel]

I think an emerald crab has take. A liking to my mini maxis. After years of growth, 3 out of the 5 I have have suddenly shrunk to a 5th of their size. Could there be another culprit? All the other corals are in good shape.

 

[Timfish]

Could be, could be a worm of some kind, could be a fish has changed it's diet as it matures, could be shifts in microbiomes, could be increased competion for nutrients as other corals are growing if the amount fed fish hasn't changed. If you're not doing water changes I would suggest doing starting. Stop carbon dosing if you are, the labile DOC can cause pathogenic shifts in microbiomes. Check pH, alklinity, calcium and magnesium if you haven't already.